Repelling Blast

Warlock Invocation
Level: Greater, 6th lv.
Components: V, S
Casting Time: 1 standard action
Range: 60 feet
Duration: instant
Saving Throw: Reflex
Spell Resistance: No

Any Medium or smaller creature struck must make a reflex save or be thrown 1d6x5ft and be knocked prone. If it would strike an object it takes 1d6 dmg per 10ft. This movement does not provoke attacks of opportunity.

(Complete Arcane, Page 134)